Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 203 [Rate centres in NPA 203] [Dial plan for NPA 203]

NXX: 557

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-557 A Westport CT NRWLCT02YMD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-557 0 Westport CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-557 1 Westport CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-557 2 Westport CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-557 3 Westport CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-557 4 Westport CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-557 5 Westport CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-557 6 Westport CT NRWLCT028MD  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-557 7 Westport CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-557 8 Westport CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920      
203-557 9 Westport CT NRWLCTCVDS0  4950 CABLEVISION LIGHTPATH, INC. - CT 920      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.